The void galaxy survey
| Autor: | Reynier Peletier, J. M. van der Hulst, Miguel A. Aragon-Calvo, B. Beygu, R. van de Weygaert, Thomas H. Jarrett, Kathryn Kreckel, J. H. van Gorkom |
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| Přispěvatelé: | Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
LOCAL VOLUME Intergalactic star PROMINENT NEARBY VOIDS MU-M FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Galaxy merger 01 natural sciences EMISSION-LINE GALAXIES 0103 physical sciences Galaxy formation and evolution H I SURVEY Astrophysics::Solar and Stellar Astrophysics galaxies: formation 010303 astronomy & astrophysics Lenticular galaxy Astrophysics::Galaxy Astrophysics Luminous infrared galaxy Physics FORMING GALAXIES 010308 nuclear & particles physics Star formation ALPHA IMAGING SURVEY Astronomy Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Dwarf spheroidal galaxy Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) galaxies: star formation MASS ASSEMBLY GAMA Elliptical galaxy galaxies: structure DIGITAL SKY SURVEY Astrophysics::Earth and Planetary Astrophysics large-scale structure of Universe FORMATION RATE INDICATORS Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notice of the Royal Astronomical Society, 458(1), 394-409. Oxford University Press |
| ISSN: | 0035-8711 |
| Popis: | We study the star formation properties of 59 void galaxies as part of the Void Galaxy Survey (VGS). Current star formation rates are derived from $\rm{H\alpha}$ and recent star formation rates from near-UV imaging. In addition, infrared 3.4 $\rm{\mu m}$, 4.6 $\rm{\mu m}$, 12 $\rm{\mu m}$ and 22 $\rm{\mu m}$ WISE emission is used as star formation and mass indicator. Infrared and optical colours show that the VGS sample displays a wide range of dust and metallicity properties. We combine these measurements with stellar and HI masses to measure the specific SFRs ($\rm{SFR/M_{*}}$) and star formation efficiencies ($\rm{SFR/M_{HI}}$). We compare the star formation properties of our sample with galaxies in the more moderate density regions of the cosmic web, 'the field'. We find that specific SFRs of the VGS galaxies as a function of stellar and HI mass are similar to those of the galaxies in these field regions. Their $\rm{SFR\alpha}$ is slightly elevated than the galaxies in the field for a given total HI mass. In the global star formation picture presented by Kennicutt-Schmidt, VGS galaxies fall into the regime of low average star formation and correspondingly low HI surface density. Their mean $\rm{SFR\alpha/M_{HI}}$ and $\rm{SFR\alpha/M_{*}}$ are of the order of $\rm{10^{-9.9}}$ $\rm{yr^{-1}}$. We conclude that while the large scale underdense environment must play some role in galaxy formation and growth through accretion, we find that even with respect to other galaxies in the more mildly underdense regions, the increase in star formation rate is only marginal. Comment: 18 pages, 17 figures, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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